Hydraulic power scoop



July 15, 1947. c. LAMBER I' L 4 HYDRAULIC POWER SCOOP Filed March 29, 1945 3 Sheets-Sheet l 3 Sheets-Sheet 2 C LAMBERT HYDRAULIC POWER SCOOP Filed March 29, 1945 July 15, 1947.

July 15, 1947. c -r 2,423,894

mnwmc POWER \SCOQP Filed l arh 29, 1945 3 Sheets-Sheet 3 Inventor Clarence l ambekf."

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Patented July 15, 1947 um'rao STATES-V PATENT OFFICE Clarence Lambert, Smith Center, Kans.

I Application March 29, 1945, Serial No. 585,454

My invention relates to improvements in hydraulic power scoops, the primary object in view being to provide a scoop power operative to dump a load, carry the same in elevated position, or in lowered position, over the ground, and which is especially designed to handle mud and like heavy material.

Another object is to provide a scoop of the type above set forth which is simple in construction, easy to operate, inexpensive to manufacture and service, and highly efficient in operation.

Other and subordinate objects, also comprehended by my invention,together with the precise nature of my improvements, and the advantages thereof, will be readily understood when the succeeding description and claim are read with reference to the drawings accompanying and forming part ofthis specification.

In said drawings:

Figure 1 is a view in top plan of my improved scoop in a preferred embodiment thereof,

Figure 2 is a view in side elevation,

Figure 3 is a view in vertical transverse section taken on the line 3-3 of Figure 2,

Figure 4 is a view in transverse section taken on the line 4-4 of Figure 3.

Reference being had to the drawings by numerals, according to my invention, a'tractor l of the "Ford-Ferguson type embodying an hydraulic power lift and an automatic control for the lift is equipped with a trailing scoop 2. e

The tractor i has been illustrated conventionally, as suiiicient for the present purposes, 3 designating the rear wheels, 4 the mud guards for the wheels, 5 the rear axle housings upon opposite sides of the transmission casing 6, 'l the seat, and 8 the usual hydraulic lift arms forming part of the hydraulic power lift automatically controlled through the medium of the com:-

pression shaft 9 backed bythe spring Ill. The numeral ll designates the usual pair of lift bars connected at upper ends thereof, by universal joints I 2 to the lift arms 8 and having their lower ends pivotally connected, as at l3, to the usual pair of side bars pivoted, as at l5, toopposite sides of the differential casing-6 forvertical swinging movement by the lift arms 8 and lift bars I I, said side bars 14, as will beunderstood, forming part of the usual draw bar mechanism of such tractors. As will be understood, by those skilled in the art, the hydraulic lift mechanism of such tractor is manually controlled by a hand, lever, not shown, for operation to swing the lift arms 8 upwardly and downwardly to correspond,- ingly swing the side bars 14 accordingly, and is 55 1 Claim. (01. 37-124) automatically controlled to swing the lift arms -8 upwardly, likewise the side bars l4, by thrust exerted against compression shaft 9 through the medium of a thrust rod 16 having its forward end pivoted to said. shaft H), as at I'I, so that said rod is vertically swingable on said shaft, all as disclosed in U. 5. letters Patent to J. D. Robertson, No. 2,321,516, dated June8, 1943, and to which attention is directed for a. more complete disclosure of the hydraulic power lift mechanism of the type of tractor with which my invention is concerned.

The scoop 2 is of elongated, forwardly opening form with a flat' bottom l8, 9. leading di ger edge It), a back 20 of substantially arcuate cross section, vertical ends 2|, and a reinforcing upper edge flange 22. A scoop-supporting shaft 23 extends horizontally through the scoop 2 with its ends journaled in bearings 24 on the ends 2| and from which said scoop hangs pendent to swing rearwardly and forwardly into dumping and scooping positions, respectively. n

A scoop-elevating and lowering shaft .25 is fitted endwlse in said scoop 2 parallel with the shaft 2'3, above and forwardly of the same, with rearwardly and downwardly inclined end crank arms 25 thereon through which said shaft 23 extends and rocks therein. A pair of forwardly extending crank arms 21 on said shaft 25' spaced apart equidistantly from the ends.of said shaft and fitting between the rear ends of the side bars M are connected at the front ends thereof to the rear ends of said bars I 4 to swing vertically thereon and by means of lateral studs 28 on said arms 21 extending through said bars I4 with retaining. pins 29 therein.

Suitably fixed on the scoop-elevating and lowering shaft 25 is a pair of upstanding, thrust rod operating lever arms 30 spaced close together upon opposite sides of the transverse center of said shaft 25 and having lower ends through which the shaft 23 is rotatably extended, and

upper ends opposed to opposite sides of the rear endof the thrust rod 15 and pivoted thereto, as

at 3|, said arms 30 being parallel with the lift b'ars ll. In the'transverse center of the scoop 2 is an upstanding detent sector 32 fitting between the lever arms 30 and provided with a rear upper edge notch 33 and a similar front upper edge notch 34. A forked detent lever 35 straddles said lever arms 30 above said sector 32 and is pivoted to said lever arms 30, as at 36, in upstanding position for forward and-rearward movement. Suitably arranged coil springs, as at 31, secured to said lever 35 and said lever arms 30, tension the lever arms'35 against-forward movement. A pull line 38 extends forwardly from-said lever 35 to the driver's seat 1 A pair oflinks, as at 39, pivoted, as at 40, to said lever arms 30- depend therefrom alongside said arms with lower ends connected to across rod 4| extending through slots, as at 42,

\ in said lever arms 30 and provided intermediate saidarms 30 with a dogging roller 43 for seating in the notches 33, 34. v 7

Referring now to the operation ofmy invention. Normally, the scoop 2 is pulled along the ground by the tractor I with the described detent mechanism holding the same against rocking, the dogging roller 43 being seated in the notch 34 of the sector 32, as will beclear. Thus the scoop 2 is locked in working position. When the scoop 2 is full, the dogging roller 43 is disengaged from v the notch 34 by swinging the detent lever 35 forwardly, under a pull on theline 38,.thereby elevating said roller 43 out of the notch34 through the mediumof the, links-39 and in opposition to the springs 42. Thus, the scoop 2 is unlatched to roll, through engagement with the ground, and

rock on the shaft. 23, clockwise as viewed in Figure 4, to dump the load, said scoop rolling and rocking on said shaft 23 until the-dogging roller 43 seats in the notch 33 and thus locks said scoop in dumping position. As will bemanifest, by operation of the described hydraulic lift mechanism to elevate and-lower the side bars I4, the scoop 2 may be elevated and lowered, as occasion may require, and asshown in dotted and full lines in Figure 2, sothat the loaded scoop 2 may be dragged along the ground, while locked in working position, topull the load along the ground, or

elevated in said locked position to carry the loaded scoop elevated for subsequent lowering and dumping in the manner described. In the event that the scoop 2, while either digging or dumping, is opposed by an immovable object, or under other conditions constitutingan overload on the scoop as regards its forward progress, said scoop tends to swing the lever arms 311 about the axis of the shaft 25, thereby causing the thrust rod 16 to exert a thrust against the shaft m, thus mechanism thereon including a pair of vertically swingable bars, a cross shaftvhaving oppositely causing the hydraulic lift mechanism to operate, automatically, in a manner to swing the side bars l4 upwardly, all as described in the aforementioned patent, whereby the scoop will be elevated 2 until such an overload condition is relieved.

The foregoing will, it is believed, suffice to impart a clear understanding of my invention with out further explanation.

'Manifestly, the invention, as described, is susceptibleof modification as regards structure and combination of parts, without departing from the inventive concept, and right is herein reserved to such modifications as fall within the scope of the appended claim.

i What I claim is:

The combination with a tractor, and power lift extending pairs of cranks thereon, one pair pivoted to said bars to provide for vertical swinging of said shaft on said bars relative thereto, a second shaft extending through the other pair of crank arms, a scoop suspended from the second shaft to rock thereon, apair of side-by-side levers fast on said cross shaft to be swung thereby relative to said bars, a lift mechanism control shaft on said tractor endwise movable, a thrust rod pivoted between the ends of said levers and op- .eratively connected to said control shaft, a notched detent sector on said scoop straddled by said levers, and sector dogging means for coaction with the sector mounted on said levers.

CLARENCE LAMBERT.

REFERENCES CITED The following references are of record in the file of this patent: v

UNITED STATES PATENTS Number Name Date 2,273,875 Livesey et al. Feb. 24, 1942 2,295,350 King Sept. 15, 1942 2,350,327 Ender June 6, 1944 

